8687890 has 16 divisors (see below), whose sum is σ = 15872832. Its totient is φ = 3423024.

The previous prime is 8687881. The next prime is 8687891. The reversal of 8687890 is 987868.

It is a self number, because there is not a number n which added to its sum of digits gives 8687890.

It is not an unprimeable number, because it can be changed into a prime (8687891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5814 + ... + 7153.

It is an arithmetic number, because the mean of its divisors is an integer number (992052).

Almost surely, 2^8687890 is an apocalyptic number.

8687890 is a deficient number, since it is larger than the sum of its proper divisors (7184942).

8687890 is a wasteful number, since it uses less digits than its factorization.

8687890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13041.

The product of its (nonzero) digits is 193536, while the sum is 46.

The square root of 8687890 is about 2947.5226886319. The cubic root of 8687890 is about 205.5755391118.

It can be divided in two parts, 86878 and 90, that added together give a palindrome (86968).

The spelling of 8687890 in words is "eight million, six hundred eighty-seven thousand, eight hundred ninety".